Get down and Raise hell

Get down verb - To come down from something (as a vehicle).

Raise hell and get down are semantically related In some cases you can use "Raise hell" instead a verb "Get down".

Raise hell verb - Take strong and forceful action, as to object or express discontent.

Get down and raise hell are semantically related in have fun topic. Sometimes you can use "Get down" instead a verb phrase "Raise hell".